buglist: bug 7269: hash does not work for Record

(1) -> T:=Record(f1:Integer)

   (1)  Record(f1: Integer)
                                                                 Type: Domain
(2) -> hash(t)

   (2)  116
                                                          Type: SingleInteger
(3) -> t:=[0]@T

   (3)  [f1= 0]
                                                    Type: Record(f1: Integer)
(4) -> hash(t)
   There are 8 exposed and 1 unexposed library operations named hash
      having 1 argument(s) but none was determined to be applicable.
      Use HyperDoc Browse, or issue
                              )display op hash
      to learn more about the available operations. Perhaps
      package-calling the operation or using coercions on the arguments
      will allow you to apply the operation.

   Cannot find a definition or applicable library operation named hash
      with argument type(s)
                             Record(f1: Integer)

      Perhaps you should use "@" to indicate the required return type,
      or "$" to specify which version of the function you need.